feat: persist userId

package-lock.json

@@ -21,6 +21,7 @@
         "@types/react": "^18.0.17",
         "@types/react-dom": "^18.0.6",
         "fast-memoize": "^2.5.2",
+        "localforage": "^1.10.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
         "react-markdown": "^8.0.3",
@@ -15987,6 +15988,22 @@
         "node": ">=8.9.0"
       }
     },
+    "node_modules/localforage": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/localforage/-/localforage-1.10.0.tgz",
+      "integrity": "sha512-14/H1aX7hzBBmmh7sGPd+AOMkkIrHM3Z1PAyGgZigA1H1p5O5ANnMyWzvpAETtG68/dC4pC0ncy3+PPGzXZHPg==",
+      "dependencies": {
+        "lie": "3.1.1"
+      }
+    },
+    "node_modules/localforage/node_modules/lie": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/lie/-/lie-3.1.1.tgz",
+      "integrity": "sha512-RiNhHysUjhrDQntfYSfY4MU24coXXdEOgw9WGcKHNeEwffDYbF//u87M1EWaMGzuFoSbqW0C9C6lEEhDOAswfw==",
+      "dependencies": {
+        "immediate": "~3.0.5"
+      }
+    },
     "node_modules/locate-path": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
@@ -35404,6 +35421,24 @@
         "json5": "^2.1.2"
       }
     },
+    "localforage": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/localforage/-/localforage-1.10.0.tgz",
+      "integrity": "sha512-14/H1aX7hzBBmmh7sGPd+AOMkkIrHM3Z1PAyGgZigA1H1p5O5ANnMyWzvpAETtG68/dC4pC0ncy3+PPGzXZHPg==",
+      "requires": {
+        "lie": "3.1.1"
+      },
+      "dependencies": {
+        "lie": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/lie/-/lie-3.1.1.tgz",
+          "integrity": "sha512-RiNhHysUjhrDQntfYSfY4MU24coXXdEOgw9WGcKHNeEwffDYbF//u87M1EWaMGzuFoSbqW0C9C6lEEhDOAswfw==",
+          "requires": {
+            "immediate": "~3.0.5"
+          }
+        }
+      }
+    },
     "locate-path": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",

package.json

@@ -17,6 +17,7 @@
     "@types/react": "^18.0.17",
     "@types/react-dom": "^18.0.6",
     "fast-memoize": "^2.5.2",
+    "localforage": "^1.10.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-markdown": "^8.0.3",

src/Bootstrap.test.tsx

@@ -1,15 +1,70 @@
-import React from 'react'
-import { render } from '@testing-library/react'
+import { act, render } from '@testing-library/react'
 import { MemoryRouter as Router } from 'react-router-dom'
+import localforage from 'localforage'
 
-import Bootstrap from './Bootstrap'
+import { PersistedStorageKeys } from 'models/storage'
 
-const StubBootstrap = () => (
+import Bootstrap, { BootstrapProps } from './Bootstrap'
+
+const mockPersistedStorage =
+  jest.createMockFromModule<jest.Mock<typeof localforage>>('localforage')
+
+const mockGetUuid = jest.fn()
+
+const mockGetItem = jest.fn()
+const mockSetItem = jest.fn()
+
+beforeEach(() => {
+  mockGetItem.mockImplementation(() => Promise.resolve(null))
+  mockSetItem.mockImplementation((data: any) => Promise.resolve(data))
+})
+
+const renderBootstrap = async (overrides: BootstrapProps = {}) => {
+  Object.assign(mockPersistedStorage, {
+    getItem: mockGetItem,
+    setItem: mockSetItem,
+  })
+
+  render(
     <Router>
-    <Bootstrap />
+      <Bootstrap
+        persistedStorage={mockPersistedStorage as any as typeof localforage}
+        {...overrides}
+      />
     </Router>
   )
 
-test('renders', () => {
-  render(<StubBootstrap />)
+  // https://kentcdodds.com/blog/fix-the-not-wrapped-in-act-warning#an-alternative-waiting-for-the-mocked-promise
+  await act(async () => {
+    await Promise.resolve()
+  })
+}
+
+test('renders', async () => {
+  await renderBootstrap()
+})
+
+test('checks persistedStorage for user settings', async () => {
+  await renderBootstrap()
+  expect(mockGetItem).toHaveBeenCalledWith(PersistedStorageKeys.USER_SETTINGS)
+})
+
+test('persists user settings if none were already persisted', async () => {
+  await renderBootstrap({
+    getUuid: mockGetUuid.mockImplementation(() => 'abc123'),
+  })
+
+  expect(mockSetItem).toHaveBeenCalledWith(PersistedStorageKeys.USER_SETTINGS, {
+    userId: 'abc123',
+  })
+})
+
+test('does not update user settings if they were already persisted', async () => {
+  mockGetItem.mockImplementation(() => ({
+    userId: 'abc123',
+  }))
+
+  await renderBootstrap()
+
+  expect(mockSetItem).not.toHaveBeenCalled()
 })

src/Bootstrap.tsx

@@ -1,15 +1,54 @@
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import { Routes, Route } from 'react-router-dom'
 import { v4 as uuid } from 'uuid'
+import localforage from 'localforage'
 
-import { Home } from './pages/Home/'
-import { PublicRoom } from './pages/PublicRoom/'
+import { Home } from 'pages/Home/'
+import { PublicRoom } from 'pages/PublicRoom/'
+import { UserSettings } from 'models/settings'
+import { PersistedStorageKeys } from 'models/storage'
 
-function Bootstrap() {
-  const [userId] = useState(uuid())
+export interface BootstrapProps {
+  persistedStorage?: typeof localforage
+  getUuid?: typeof uuid
+}
+
+function Bootstrap({
+  persistedStorage = localforage.createInstance({
+    name: 'chitchatter',
+    description: 'Persisted settings data for chitchatter',
+  }),
+  getUuid = uuid,
+}: BootstrapProps) {
+  const [hasLoadedSettings, setHasLoadedSettings] = useState(false)
+  const [settings, setSettings] = useState({ userId: getUuid() })
+  const { userId } = settings
+
+  useEffect(() => {
+    ;(async () => {
+      if (hasLoadedSettings) return
+
+      const persistedUserSettings =
+        await persistedStorage.getItem<UserSettings>(
+          PersistedStorageKeys.USER_SETTINGS
+        )
+
+      if (persistedUserSettings) {
+        setSettings(persistedUserSettings)
+      } else {
+        await persistedStorage.setItem(
+          PersistedStorageKeys.USER_SETTINGS,
+          settings
+        )
+      }
+
+      setHasLoadedSettings(true)
+    })()
+  }, [hasLoadedSettings, persistedStorage, settings, userId])
 
   return (
     <div className="Chitchatter">
+      {hasLoadedSettings ? (
         <Routes>
           {['/', '/index.html'].map(path => (
             <Route key={path} path={path} element={<Home />} />
@@ -19,6 +58,7 @@ function Bootstrap() {
             element={<PublicRoom userId={userId} />}
           />
         </Routes>
+      ) : null}
     </div>
   )
 }

src/models/settings.ts

@@ -0,0 +1,3 @@
+export interface UserSettings {
+  userId: string
+}

src/models/storage.ts

@@ -0,0 +1,3 @@
+export enum PersistedStorageKeys {
+  USER_SETTINGS = 'userSettings',
+}